Security system for a stand-alone computer
Patent 5402492 Issued on March 28, 1995. Estimated Expiration Date: 
June 18, 2013. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
June 18, 2013. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesComputer with improved keyboard password functions Computer data security device and method Method of protecting computer software from unauthorized execution using multiple keys Computer system security device Computer security system Patent #: 5297200 InventorsApplicationNo. 079630 filed on 06/18/1993US Classes:713/166Security levelsExaminersPrimary: Barron, Gilberto Jr.Attorney, Agent or FirmInternational ClassH04L 009/32AbstractA security system for stand alone and portable computer hosts which utilizes both a hardware key and a password key to enable-access to the computer host. The entry of the password key and the hardware key is monitored by the keyboard controller. The keyboard controller alters a status bit during the POST portion of the host code if access is granted. The host security is divided into two levels of security, a first administrative level and a second user level. The administrative level is accessible by the entry of a first password or by the hardware key and enables access to all levels of the host SET-UP configuration. The user level is accessible by the entry of a second password and only enables access to a limited portion of the setup configuration.Field of SearchHaving particular key generator | |
